Senior Software Engineer (.Net + Azure)

 

Summary

Join Aperia Solutions, a leader in SaaS solutions for the Payments and Compliance industries. Aperia is a Texas-based fintech and managed consultancy firm that creates custom SaaS applications and other software-based solutions for the payments, banking, and processing industry. Founded in 1999, Aperia offers business intelligence, risk management, compliance, and customer intelligence platforms. With offices in Dallas, Washington DC, and Vietnam, Aperia is a fast-paced, global organization that strives to improve efficiency in compliance, risk, and customer service operations. Aperia is now looking to grow its global footprint by putting roots down in Eastern Europe. After two years of extensive market research and multiple executive visits to the region we have chosen Cracow as our hub for our future growth. Aperia’s clients include banks, processors, payment facilitators, merchant service providers, independent sales organizations, and government entities. A career at Aperia promises a great challenge, culture, and opportunities to forge your own path.

Overview

We are seeking a skilled C# Developer with strong experience in Microsoft Azure, modern cloud‑native development practices, and hands-on support of legacy .NET and ASP applications. This role supports mission‑critical systems in the financial payments industry, where reliability, observability, secure engineering, and disciplined operational processes are essential.

The ideal candidate is equally comfortable diagnosing distributed cloud applications, maintaining older codebases, and executing production‑grade patching and deployment workflows.

Key Responsibilities

Azure Application Development & Support

• Develop, enhance, and support C#/.NET applications deployed in Azure.
• Work extensively with Azure Functions, App Services, Cosmos DB, Storage Accounts, Key Vault, and related Azure services.
• Implement and optimize Azure Diagnostics, including:
  • Application Insights (KQL queries, dashboards, performance analysis)
  • Azure Monitor (alerts, metrics, log analytics)
  • Distributed tracing, dependency tracking, and end‑to‑end transaction visibility.
• Troubleshoot production issues using logs, telemetry, and diagnostic tools to ensure high availability and performance.

Production Support, Patching & Code Fixes

• Own and execute patching, hotfixes, and code-level remediation for production systems.
• Participate in on-call or rotational support for critical financial applications.
• Ensure all fixes follow established SDLC, testing, and deployment processes.
• Collaborate with QA, operations, and compliance teams to validate and release changes safely.

Legacy Application Support

• Maintain and enhance ASP.NET 2.0 WebForms, classic ASP, and other legacy components still in active use.
• Refactor and modernize legacy code where appropriate while ensuring backward compatibility.
• Assist in planning and executing modernization efforts toward Azure-based architectures.

Financial Payments Domain

• Support applications that process sensitive financial transactions with strict uptime, accuracy, and compliance requirements.
• Follow secure coding practices aligned with PCI DSS and industry standards.
• Work closely with compliance and audit teams to ensure system integrity and traceability.

Required Skills & Experience

Technical Skills

• Strong proficiency in C#, .NET Framework, and .NET Core.
• Hands-on experience with:
  • Azure Functions
  • Cosmos DB (SQL API preferred)
  • Azure App Services
  • Application Insights & Azure Monitor
  • Azure Diagnostics, logging, and telemetry pipelines
• Solid understanding of Azure fundamentals: networking, identity, resource organization, scaling, and cost management.
• Experience supporting and debugging:
• ASP.NET 2.0 WebForms
• Classic ASP
• IIS-hosted applications

DevOps, Deployment & Code Processes

• Strong familiarity with:
  • Azure DevOps (repos, pipelines, boards)
  • Git (branching, pull requests, code reviews)